// Copyright (c) 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include <stdint.h>

#include "skia/ext/skia_utils_base.h"
#include "third_party/skia/include/core/SkFontLCDConfig.h"

namespace skia {

bool ReadSkString(base::PickleIterator* iter, SkString* str)
{
    int reply_length;
    const char* reply_text;

    if (!iter->ReadData(&reply_text, &reply_length))
        return false;

    if (str)
        str->set(reply_text, reply_length);
    return true;
}

bool ReadSkFontIdentity(base::PickleIterator* iter,
    SkFontConfigInterface::FontIdentity* identity)
{
    uint32_t reply_id;
    uint32_t reply_ttcIndex;
    int reply_length;
    const char* reply_text;

    if (!iter->ReadUInt32(&reply_id) || !iter->ReadUInt32(&reply_ttcIndex) || !iter->ReadData(&reply_text, &reply_length))
        return false;

    if (identity) {
        identity->fID = reply_id;
        identity->fTTCIndex = reply_ttcIndex;
        identity->fString.set(reply_text, reply_length);
    }
    return true;
}

bool ReadSkFontStyle(base::PickleIterator* iter, SkFontStyle* style)
{
    uint16_t reply_weight;
    uint16_t reply_width;
    uint16_t reply_slant;

    if (!iter->ReadUInt16(&reply_weight) || !iter->ReadUInt16(&reply_width) || !iter->ReadUInt16(&reply_slant))
        return false;

    if (style) {
        *style = SkFontStyle(reply_weight,
            reply_width,
            static_cast<SkFontStyle::Slant>(reply_slant));
    }
    return true;
}

bool WriteSkString(base::Pickle* pickle, const SkString& str)
{
    return pickle->WriteData(str.c_str(), str.size());
}

bool WriteSkFontIdentity(base::Pickle* pickle,
    const SkFontConfigInterface::FontIdentity& identity)
{
    return pickle->WriteUInt32(identity.fID) && pickle->WriteUInt32(identity.fTTCIndex) && WriteSkString(pickle, identity.fString);
}

bool WriteSkFontStyle(base::Pickle* pickle, SkFontStyle style)
{
    return pickle->WriteUInt16(style.weight()) && pickle->WriteUInt16(style.width()) && pickle->WriteUInt16(style.slant());
}

SkPixelGeometry ComputeDefaultPixelGeometry()
{
    SkFontLCDConfig::LCDOrder order = SkFontLCDConfig::GetSubpixelOrder();
    if (SkFontLCDConfig::kNONE_LCDOrder == order) {
        return kUnknown_SkPixelGeometry;
    }

    // Bit0 is RGB(0), BGR(1)
    // Bit1 is H(0), V(1)
    const SkPixelGeometry gGeo[] = {
        kRGB_H_SkPixelGeometry,
        kBGR_H_SkPixelGeometry,
        kRGB_V_SkPixelGeometry,
        kBGR_V_SkPixelGeometry,
    };
    int index = 0;
    if (SkFontLCDConfig::kBGR_LCDOrder == order) {
        index |= 1;
    }
    if (SkFontLCDConfig::kVertical_LCDOrientation == SkFontLCDConfig::GetSubpixelOrientation()) {
        index |= 2;
    }
    return gGeo[index];
}

} // namespace skia
